6 | Operation
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BeWa CTU1x3x-CTU1x4x 4093420f en-us web
6.6 Labeling the filter membrane
Label the filter membranes that you have just removed using a
clear and logical system. For example:
xyz-1-A-005
Tab. 9: Example - Marking of filter membranes
Marking
Description
XYZ
Running test item series/running test item
lot
1
Number of the filter membranes provided
A
When several flushing procedures are car-
ried out on a test item A, B, C …,
Z for the establishment of the negative con-
trol value for the filter membrane
005
Rating of the filter membrane
005 = 5 µm
010 = 10 µm
100 = 100 µm
1
2
3
4
5
6
7
8
9
A
Summary of Contents for CTU 1 3 Series
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